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/*
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "qt_instance.h"
#include "Error.h"
#include "JSDOMBinding.h"
#include "JSGlobalObject.h"
#include "JSLock.h"
#include "ObjectPrototype.h"
#include "PropertyNameArray.h"
#include "qt_class.h"
#include "qt_runtime.h"
#include "runtime_object.h"
#include "runtime/FunctionPrototype.h"
#include <qdebug.h>
#include <qhash.h>
#include <qmetaobject.h>
#include <qmetatype.h>
#include <qwebelement.h>
namespace JSC {
namespace Bindings {
// Cache QtInstances
typedef QMultiHash<void*, QtInstance*> QObjectInstanceMap;
static QObjectInstanceMap cachedInstances;
// Derived RuntimeObject
class QtRuntimeObject : public RuntimeObject {
public:
QtRuntimeObject(ExecState*, JSGlobalObject*, PassRefPtr<Instance>);
static const ClassInfo s_info;
virtual void markChildren(MarkStack& markStack)
{
RuntimeObject::markChildren(markStack);
QtInstance* instance = static_cast<QtInstance*>(getInternalInstance());
if (instance)
instance->markAggregate(markStack);
}
static PassRefPtr<Structure> createStructure(JSValue prototype)
{
return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
}
protected:
static const unsigned StructureFlags = RuntimeObject::StructureFlags | OverridesMarkChildren;
};
const ClassInfo QtRuntimeObject::s_info = { "QtRuntimeObject", &RuntimeObject::s_info, 0, 0 };
QtRuntimeObject::QtRuntimeObject(ExecState* exec, JSGlobalObject* globalObject, PassRefPtr<Instance> instance)
: RuntimeObject(exec, globalObject, WebCore::deprecatedGetDOMStructure<QtRuntimeObject>(exec), instance)
{
}
// QtInstance
QtInstance::QtInstance(QObject* o, PassRefPtr<RootObject> rootObject, QScriptEngine::ValueOwnership ownership)
: Instance(rootObject)
, m_class(0)
, m_object(o)
, m_hashkey(o)
, m_ownership(ownership)
{
// This is a good place to register Qt metatypes that are in the QtWebKit module, as this is class will initialize if we have a QObject bridge.
qRegisterMetaType<QWebElement>();
}
QtInstance::~QtInstance()
{
JSLock lock(SilenceAssertionsOnly);
cachedInstances.remove(m_hashkey);
// clean up (unprotect from gc) the JSValues we've created
m_methods.clear();
qDeleteAll(m_fields);
m_fields.clear();
if (m_object) {
switch (m_ownership) {
case QScriptEngine::QtOwnership:
break;
case QScriptEngine::AutoOwnership:
if (m_object->parent())
break;
// fall through!
case QScriptEngine::ScriptOwnership:
delete m_object;
break;
}
}
}
PassRefPtr<QtInstance> QtInstance::getQtInstance(QObject* o, PassRefPtr<RootObject> rootObject, QScriptEngine::ValueOwnership ownership)
{
JSLock lock(SilenceAssertionsOnly);
foreach (QtInstance* instance, cachedInstances.values(o))
if (instance->rootObject() == rootObject) {
// The garbage collector removes instances, but it may happen that the wrapped
// QObject dies before the gc kicks in. To handle that case we have to do an additional
// check if to see if the instance's wrapped object is still alive. If it isn't, then
// we have to create a new wrapper.
if (!instance->getObject())
cachedInstances.remove(instance->hashKey());
else
return instance;
}
RefPtr<QtInstance> ret = QtInstance::create(o, rootObject, ownership);
cachedInstances.insert(o, ret.get());
return ret.release();
}
bool QtInstance::getOwnPropertySlot(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
return object->JSObject::getOwnPropertySlot(exec, propertyName, slot);
}
void QtInstance::put(JSObject* object, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
object->JSObject::put(exec, propertyName, value, slot);
}
void QtInstance::removeCachedMethod(JSObject* method)
{
if (m_defaultMethod.get() == method)
m_defaultMethod.clear();
for (QHash<QByteArray, DeprecatedPtr<JSObject> >::Iterator it = m_methods.begin(),
end = m_methods.end(); it != end; ++it)
if (it.value().get() == method) {
m_methods.erase(it);
return;
}
}
QtInstance* QtInstance::getInstance(JSObject* object)
{
if (!object)
return 0;
if (!object->inherits(&QtRuntimeObject::s_info))
return 0;
return static_cast<QtInstance*>(static_cast<RuntimeObject*>(object)->getInternalInstance());
}
Class* QtInstance::getClass() const
{
if (!m_class) {
if (!m_object)
return 0;
m_class = QtClass::classForObject(m_object);
}
return m_class;
}
RuntimeObject* QtInstance::newRuntimeObject(ExecState* exec)
{
JSLock lock(SilenceAssertionsOnly);
m_methods.clear();
return new (exec) QtRuntimeObject(exec, exec->lexicalGlobalObject(), this);
}
void QtInstance::markAggregate(MarkStack& markStack)
{
if (m_defaultMethod)
markStack.append(&m_defaultMethod);
foreach (DeprecatedPtr<JSObject> val, m_methods.values()) {
if (val)
markStack.append(&val);
}
}
void QtInstance::begin()
{
// Do nothing.
}
void QtInstance::end()
{
// Do nothing.
}
void QtInstance::getPropertyNames(ExecState* exec, PropertyNameArray& array)
{
// This is the enumerable properties, so put:
// properties
// dynamic properties
// slots
QObject* obj = getObject();
if (obj) {
const QMetaObject* meta = obj->metaObject();
int i;
for (i = 0; i < meta->propertyCount(); i++) {
QMetaProperty prop = meta->property(i);
if (prop.isScriptable())
array.add(Identifier(exec, prop.name()));
}
#ifndef QT_NO_PROPERTIES
QList<QByteArray> dynProps = obj->dynamicPropertyNames();
foreach (const QByteArray& ba, dynProps)
array.add(Identifier(exec, ba.constData()));
#endif
const int methodCount = meta->methodCount();
for (i = 0; i < methodCount; i++) {
QMetaMethod method = meta->method(i);
if (method.access() != QMetaMethod::Private)
array.add(Identifier(exec, method.signature()));
}
}
}
JSValue QtInstance::getMethod(ExecState* exec, const Identifier& propertyName)
{
if (!getClass())
return jsNull();
MethodList methodList = m_class->methodsNamed(propertyName, this);
return new (exec) RuntimeMethod(exec, exec->lexicalGlobalObject(), WebCore::deprecatedGetDOMStructure<RuntimeMethod>(exec), propertyName, methodList);
}
JSValue QtInstance::invokeMethod(ExecState*, RuntimeMethod*)
{
// Implemented via fallbackMethod & QtRuntimeMetaMethod::callAsFunction
return jsUndefined();
}
JSValue QtInstance::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
{
if (hint == PreferString)
return stringValue(exec);
if (hint == PreferNumber)
return numberValue(exec);
return valueOf(exec);
}
JSValue QtInstance::stringValue(ExecState* exec) const
{
QObject* obj = getObject();
if (!obj)
return jsNull();
// Hmm.. see if there is a toString defined
QByteArray buf;
bool useDefault = true;
getClass();
if (m_class) {
// Cheat and don't use the full name resolution
int index = obj->metaObject()->indexOfMethod("toString()");
if (index >= 0) {
QMetaMethod m = obj->metaObject()->method(index);
// Check to see how much we can call it
if (m.access() != QMetaMethod::Private
&& m.methodType() != QMetaMethod::Signal
&& m.parameterTypes().isEmpty()) {
const char* retsig = m.typeName();
if (retsig && *retsig) {
QVariant ret(QMetaType::type(retsig), (void*)0);
void * qargs[1];
qargs[0] = ret.data();
if (QMetaObject::metacall(obj, QMetaObject::InvokeMetaMethod, index, qargs) < 0) {
if (ret.isValid() && ret.canConvert(QVariant::String)) {
buf = ret.toString().toLatin1().constData(); // ### Latin 1? Ascii?
useDefault = false;
}
}
}
}
}
}
if (useDefault) {
const QMetaObject* meta = obj ? obj->metaObject() : &QObject::staticMetaObject;
QString name = obj ? obj->objectName() : QString::fromUtf8("unnamed");
QString str = QString::fromUtf8("%0(name = \"%1\")")
.arg(QLatin1String(meta->className())).arg(name);
buf = str.toLatin1();
}
return jsString(exec, buf.constData());
}
JSValue QtInstance::numberValue(ExecState*) const
{
return jsNumber(0);
}
JSValue QtInstance::booleanValue() const
{
// ECMA 9.2
return jsBoolean(getObject());
}
JSValue QtInstance::valueOf(ExecState* exec) const
{
return stringValue(exec);
}
// In qt_runtime.cpp
JSValue convertQVariantToValue(ExecState*, PassRefPtr<RootObject> root, const QVariant& variant);
QVariant convertValueToQVariant(ExecState*, JSValue, QMetaType::Type hint, int *distance);
QByteArray QtField::name() const
{
if (m_type == MetaProperty)
return m_property.name();
if (m_type == ChildObject && m_childObject)
return m_childObject->objectName().toLatin1();
#ifndef QT_NO_PROPERTIES
if (m_type == DynamicProperty)
return m_dynamicProperty;
#endif
return QByteArray(); // deleted child object
}
JSValue QtField::valueFromInstance(ExecState* exec, const Instance* inst) const
{
const QtInstance* instance = static_cast<const QtInstance*>(inst);
QObject* obj = instance->getObject();
if (obj) {
QVariant val;
if (m_type == MetaProperty) {
if (m_property.isReadable())
val = m_property.read(obj);
else
return jsUndefined();
} else if (m_type == ChildObject)
val = QVariant::fromValue((QObject*) m_childObject);
#ifndef QT_NO_PROPERTIES
else if (m_type == DynamicProperty)
val = obj->property(m_dynamicProperty);
#endif
return convertQVariantToValue(exec, inst->rootObject(), val);
}
QString msg = QString(QLatin1String("cannot access member `%1' of deleted QObject")).arg(QLatin1String(name()));
return throwError(exec, createError(exec, msg.toLatin1().constData()));
}
void QtField::setValueToInstance(ExecState* exec, const Instance* inst, JSValue aValue) const
{
if (m_type == ChildObject) // QtScript doesn't allow setting to a named child
return;
const QtInstance* instance = static_cast<const QtInstance*>(inst);
QObject* obj = instance->getObject();
if (obj) {
QMetaType::Type argtype = QMetaType::Void;
if (m_type == MetaProperty)
argtype = (QMetaType::Type) QMetaType::type(m_property.typeName());
// dynamic properties just get any QVariant
QVariant val = convertValueToQVariant(exec, aValue, argtype, 0);
if (m_type == MetaProperty) {
if (m_property.isWritable())
m_property.write(obj, val);
}
#ifndef QT_NO_PROPERTIES
else if (m_type == DynamicProperty)
obj->setProperty(m_dynamicProperty.constData(), val);
#endif
} else {
QString msg = QString(QLatin1String("cannot access member `%1' of deleted QObject")).arg(QLatin1String(name()));
throwError(exec, createError(exec, msg.toLatin1().constData()));
}
}
}
}
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